Results 231 to 240 of about 103,133 (267)
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Assisted Circulation by Counterpulsation.
Annals of Internal Medicine, 1963Excerpt Counterpulsation permits aspiration of blood during the heart's systole and its return during diastole from a single cannula in the femoral artery.
Armand A. Lefemine +4 more
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Assisted circulation without systemic heparinization
Journal of Cardiothoracic and Vascular Anesthesia, 1994The need for improvements in materials and equipment for extracorporeal circulation has been obvious for years. Among the surfaces with biologically active compounds, those with heparin binding have been found sufficiently thromboresistant and particularly suitable for different types of artificial perfusion.
Weiss, B M +5 more
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Horizons in Assisted Circulation
1989Research on the artificial heart was initiated about 30 years ago, many types of circulatory assist devices intended for different clinical applications have been developed and introduced. Although enthusiastically pursued by many investigators, the ultimate goal, a totally implantable permanent artificial heart, still requires many years of research ...
H. Emoto, L. K. Fujimoto, Y. Nosé
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Assisted Circulation in Cardiac and Respiratory Insufficiency
Artificial Organs, 1983Summary: Intra‐aortic counterpulsation with a balloon pump (IABP) was used in 63 patients with cardiogenic shock, heart failure after surgery with artificial circulation, internal lacerations of the myocardium, or unstable angina. It was found that the IABP was most efficient in conditions related to myocardial ischemia. Use of arteriovenous perfusion
Shumakov Vi +2 more
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Assisted Circulation Controlled by Electronic Computation
IEEE Transactions on Biomedical Engineering, 1965Electronic digital and analog computer techniques have recently been utilized in a unique mathematical model design approach for a myocardial augmentation system. This system incorporates solid-state circuitry in a special purpose computer design for conversion of physiological input data to pump actuator commands which precisely withdraw arterial ...
M. G. Chesnut +2 more
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Assisted Circulation: A Progress Report
Hospital Practice, 1971Temporary circulatory assist devices now appear to hold more promise of clinical application than permanent, implanted artificial hearts. Two contrasting approaches to temporary assist are described: the bypass and the counterpulsation pump. The latter has developed into a completely external system through which coronary filling is enhanced and blood ...
William C. Birtwell, Harry S. Soroff
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A Miniaturized Centrifugal Pump for Assist Circulation
Artificial Organs, 1994Abstract: The newly developed Nikkiso HMS–15 is a miniaturized centrifugal pump. It has an impeller diameter of only 50 mm and a priming volume of only 25 ml. A totally new approach was applied to develop this very small pump. The new pump showed comparable hemolysis with pumps twice as big (e.
Shiaki Kawada +4 more
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Rotor Pumps for Artificial and Assisted Circulation
Biomedical Engineering, 2011The history of development of rotor pumps for artificial and assisted circulation is discussed in this work. Advantages of rotor pumps over pulsating pumps in implanted systems are considered: minimal size, energy consumption, and cost. Major directions in the development of rotor pumps include bearing elements, which determine pump service life. Axial
G. P. Itkin, S. V. Selishchev
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Future Directions in Assisted Circulation
1995Prediction of the future is always a hazardous undertaking and brings to mind a remark attributed to the thirteenth-century Castilian king, Alfonso X, when the Ptolemaic astronomical concepts had been explained: “If the Lord Almighty had consulted me, I should have recommended something simpler!”
R. S. Litwak, R. M. Koffsky
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Studies on mechanical assistance to the failing circulation
The American Journal of Surgery, 1970Abstract Our experience with various experimental approaches to mechanically assist the failing circulation is presented. Particular emphasis is placed on the potential value of left heart bypass. A new pulsatile athrombogenic pump which does not require heparin is described.
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